No, not all nems are green. who knows why Jr changed colors. I've had it happen for no apparent reason. nems are crazy!
Yes a lot of people get mad about it when they order something like a Colorado sunburst and it turns into a rainbow bubble tip it usually is because of a change in the environment the colors or pigments produced are meant to absorb or reflect certain wave lengths of light all lighting is usually different as are water parameters so changing things can in return cause the zooxan to change their pigments
